java - Arraylist 打印带有计数的对象

Question

这个问题已经有答案了:

how to print the index number of elements in the ArrayList using for each looping (4 个回答)

已关闭 4 年前。

这是我的代码

ArrayList<Restaurant> restaurant= new ArrayList<Restaurant>(); 

内部餐厅类，

@Override
public String toString() {
    int i=1;
    return "\n"+(i++)+". "+this.restaurantName + 
           "\t\t"+this.location;
}

我想这样打印

[ 1. pizzahut bangalore, 2. dominos delhi]

而是打印

[ 1. pizzahut bangalore, 1. dominos delhi]

需要代码帮助。

Answer 1

这是另一个解决方案，我不确定您遇到的实际问题是什么，所以只需提供另一个可能的解决方案。这可能对你有用。

public class Restaurant {

    static int index = 1;
    String restaurantName;
    String location;
    int curIndex;

    Restaurant(final String restaurantName, final String location) {
        this.restaurantName = restaurantName;
        this.location = location;
        this.curIndex = index++;
    }

    public static void main(final String[] input) {
        final ArrayList<Restaurant> restaurant = new ArrayList<Restaurant>();
        restaurant.add(new Restaurant("pizzahut", "bangalore"));
        restaurant.add(new Restaurant("dominos", "delhi"));

        restaurant.forEach(r -> System.out.println(r));
    }

    public String toString() {
        return "\n" + curIndex + ". " + this.restaurantName +
                "\t\t" + this.location;
    }
}